Abstract

APARICIO, V. A. et al. High-protein diets and renal status in rats. Nutr. Hosp. [online]. 2013, vol.28, n.1, pp.232-237. ISSN 1699-5198.  https://dx.doi.org/10.3305/nh.2013.28.1.6165.

Introduction: High-protein (HP) diets might affect renal status. We aimed to examine the effects of a HP diet on plasma, urinary and morphological renal parameters in rats. Material and methods: Twenty Wistar rats were randomly distributed in 2 experimental groups with HP or normal-protein (NP) diets over 12 weeks. Results and discussion: Final body weight was a 10% lower in the HP group (p < 0.05) whereas we have not observed differences on food intake, carcass weight and muscle ashes content. No significant clear differences were observed on plasma parameters, whereas urinary citrate was an 88% lower in the HP group (p = 0.001) and urinary pH a 15% more acidic (p < 0.001). Kidney wet mass was ~22 heavier in the HP group (p < 0.001). Renal mesangium area was a 32% higher in the HP group (p < 0.01). Glomerular 1 and 2 were also ~30 higher in the HP diet (p < 0.01 and p < 0.05, respectively) and glomerular area a 13% higher (p < 0.01). Conclusion: High-protein diet promoted a worse renal profile, especially on urinary and morphological markers, which could increase the risk for developing renal diseases in the long time.

Keywords : High-protein diet; Plasma; Urine; Kidney; Renal morphology; Rats.

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